HSS 3101 Chapter Notes - Chapter 6: Randomized Controlled Trial, Prevalence, Cohort Study
3 Oct 2017
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Overview of study designs in health: exposures and measures. Number of new cases per population at risk in a given time period ie. if your experiment has 100 participants who are observed over one year and the outcome occurs in. 5 people over this one year: 5/100 = 5%, therefore the incidence rate is 5% Point prevalence: the number of existing cases in a prede ned population at a speci c point in time. Period prevalence: the number of cases occurring in a prede ned population over a speci c time period. Prevalence is useful for measuring the burden of a chronic disease (ie. tuberculosis) Prevalence is useful for measuring the burden of a chronic disease (ie. tuberculosis) ie. if you have 100 participants and 20 already have the disease at the start of the study, the point prevalence is: 20/100 = 20%. At the end of the one year period 5 more, 25 total, have the disease:
